In obedience to Jesus' command, 'Do this in remembrance of me', the ritual repetition of the Lord's Supper down through the ages and across multiple Christian cultures in the liturgies of East and West, has given rise, inevitably, to innumerable diversities of shape, text, cultural context, and theological interpretation, as well as to debates, sometimes heated, among modern experts as to the methodologies for resolving the problems arising from these differences. The problems of cultural history, structural, historical, and textual reconstruction, theological interpretation, and method...